Product
Xiaomi Mi 4s
Xiaomi Mi 4s
Samsung Galaxy M55s
Samsung Galaxy M55s
Battery
Charging 18W wired, QC2, 40% in 60 min 45W wired
Type Li-Ion 3260 mAh, non-removable 5000 mAh
Body
Dimensions 139.3 x 70.8 x 7.8 mm (5.48 x 2.79 x 0.31 in) 163.9 x 76.5 x 7.8 mm (6.45 x 3.01 x 0.31 in)
SIM Nano-SIM + Micro-SIM Nano-SIM + Nano-SIM
Weight 133 g (4.69 oz) 180 g (6.35 oz)
Comms
Bluetooth 4.1, A2DP 5.2, A2DP, LE
Infrared port Yes -
NFC No Yes
Positioning GPS, GLONASS, BDS GPS, GALILEO, GLONASS, BDS, QZSS
Radio No No
USB USB Type-C USB Type-C 2.0, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
Display
Resolution 1080 x 1920 pixels, 16:9 ratio (~441 ppi density) 1080 x 2400 pixels, 20:9 ratio (~393 ppi density)
Size 5.0 inches, 68.9 cm2 (~69.9% screen-to-body ratio) 6.7 inches, 108.4 cm2 (~86.4% screen-to-body ratio)
Type IPS LCD Super AMOLED+, 120Hz, 1000 nits (HBM)
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Launch
Announced 2016, February. Released 2016, March 2024, September 24
Status Discontinued Available. Released 2024, September 26
Main Camera
Features Dual-LED dual-tone flash, panorama, HDR LED flash, panorama, HDR
Single 13 MP, f/2.0, PDAF -
Triple - 50 MP, f/1.8, (wide), 1/1.56", 1.0µm, PDAF, OIS 8 MP, f/2.2, 123˚ (ultrawide) 2 MP, f/2.4, (macro)
Video 1080p@30fps, 720p@120fps 4K@30fps, 1080p@30/60fps, gyro-EIS, OIS
Memory
Card slot microSDXC (uses shared SIM slot) microSDXC (uses shared SIM slot)
Internal 64GB 3GB RAM 128GB 8GB RAM, 256GB 8GB RAM
  eMMC 5.0 -
Misc
Colors Black, White, Gold, Pink Thunder Black, Coral Green
Models - SM-M558B, SM-M558B/DS
SAR - 0.93 W/kg (head)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands 1, 3, 7, 38, 39, 40, 41 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 25, 26, 28, 38, 40, 41, 66
5G bands - 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6
Speed HSPA, LTE Cat4 150/50 Mbps HSPA, LTE, 5G
Technology GSM / CDMA / HSPA / LTE GSM / HSPA / LTE / 5G
  TD-SCDMA -
Our Tests
Audio quality Noise -94.9dB / Crosstalk -82.6dB -
Battery (old) Endurance rating 75h -
Camera Photo / Video -
Display Contrast ratio: 975:1 (nominal), 2.095 (sunlight) -
Loudspeaker Voice 73dB / Noise 68dB / Ring 82dB -
Performance Basemark OS II 2.0: 1545Basemark X: 12990 -
Platform
Chipset Qualcomm MSM8992 Snapdragon 808 (20 nm) Qualcomm SM7450-AB Snapdragon 7 Gen 1 (4 nm)
CPU Hexa-core (4x1.4 GHz Cortex-A53 & 2x1.8 GHz Cortex-A57) Octa-core (1x2.4 GHz Cortex-A710 & 3x2.36 GHz Cortex-A710 & 4x1.8 GHz Cortex-A510)
GPU Adreno 418 Adreno 644
OS Android 5.1 (Lollipop), upgradable to 7.0 (Nougat), MIUI 10 Android 14, up to 4 major Android upgrades, One UI 6.1
Selfie camera
Single 5 MP, f/2.0 50 MP, f/2.4, (wide)
Video 1080p@30fps 4K@30fps, 1080p@30/60fps
Sound
3.5mm jack Yes No
Loudspeaker Yes Yes, with stereo speakers